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3-2 HEAT EXCHANGE CAPACITY CONTROL
The heat exchanger capacity and four-way valve, solenoid valve, and electronic expansion valve operation states
are shown below.
1. Cooling, Cooling main
4-way valve (4WV)
Pattern
4WV2 4WV3 4WV4
1
OFF
ON
2
ON
OFF
3
ON
ON
4
OFF
ON
5
ON
OFF
6
OFF
OFF
2. Heating, Heating main
4-way valve (4WV)
Pattern
4WV2 4WV3 4WV4
1
ON
ON
2
ON
ON
3
ON
ON
4
ON
ON
5
ON
ON
6
ON
ON
3. Stop and same capacity operation
4-way valve (4WV)
Pattern
4WV2 4WV3 4WV4
1
OFF
OFF
2
ON
ON
Solenoid valve
Electronic expansion
(SV)
SV7
SV8
ON
ON
OFF
Control pulse
ON
OFF
ON
Control pulse
OFF
OFF
OFF
0 pulse
OFF
ON
OFF
Control pulse
OFF
OFF
ON
Control pulse
OFF
ON
ON
Control pulse
Solenoid valve
Electronic expansion
(SV)
SV7
SV8
ON
ON
OFF
Control pulse
ON
OFF
ON
Control pulse
ON
OFF
OFF
0 pulse
ON
ON
OFF
Control pulse
ON
OFF
ON
Control pulse
ON
ON
ON
Control pulse
Solenoid valve
Electronic expansion
(SV)
SV7
SV8
OFF
OFF
OFF
280 pulse
ON
OFF
OFF
0 pulse
03-03
valve (EEV)
exchanger(HP)
EEV1
EEV2
0 pulse
0 pulse
Control pulse
Control pulse
Control pulse
Control pulse
valve (EEV)
exchanger(HP)
EEV1
EEV2
0 pulse
0 pulse
Control pulse
Control pulse
Control pulse
Control pulse
valve (EEV)
exchanger(HP)
EEV1
EEV2
280 pulse
0 pulse
Used heat
Remarks
2
4
6
Cooling 2HP
Cooling 4HP
Cooling 6HP
Cooling 8HP
Cooling 10HP
Cooling 12HP
Used heat
Remarks
2
4
6
Heating 2HP
Heating 4HP
Heating 6HP
Heating 8HP
Heating 10HP
Heating 12HP
Used heat
Remarks
2
4
6
Stop
Same capacity
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